package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;
import java.util.concurrent.TimeUnit;

import static net.sf.jsqlparser.util.validation.metadata.NamedObject.user;


public class LoginInterceptor implements HandlerInterceptor {
   /* private StringRedisTemplate stringRedisTemplate;

    public LoginInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }*/
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        /*//1、获取session
        HttpSession session = request.getSession();

        //2、获取session中的用户
        Object user = session.getAttribute("user");


        //3、判断用户是否存在
        if (user == null) {
            //4、不存在，拦截
            response.setStatus(401);
            return false;
        }

        //5、存在，保存信息到ThreadLocal
        UserHolder.saveUser((UserDTO) user);
        //6、放行
        return true;*/
        /*
        交给RefreshTokenInterceptor处理
        // 1、获取请求头中的token
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank( token)) {
            response.setStatus(401);
            return false;
        }

        //  2、基于token获取redis中的用户
        String Key = RedisConstants.LOGIN_USER_KEY + token;
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash() .entries(Key);

        //3、判断用户是否存在
        if (userMap.isEmpty()) {
            //4、不存在，拦截
            response.setStatus(401);
            return false;

        }
        // 5、将查询到的hash数据转为UserDTO对象
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        // 6、存在，保存信息到ThreadLocal
        UserHolder.saveUser(userDTO);
        //7、刷新token有效期
        stringRedisTemplate.expire(Key, RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);*/
        //保存用户交给了RefreshTokenInterceptor处理
        //1、判断是否需要拦截（ThreadLocal中是否有用户）
        if (UserHolder.getUser() == null) {
            //没有的话拦截设置状态码
            response.setStatus(401);
            //拦截
            return false;
        }
        //有用户，放行
        return true;
    }
   /* @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //移除用户
        UserHolder.removeUser();
    }*/
}
